Abstract: An improved rodent trap is provided for enticing and entrapping rodents in a humane fashion, and that permits the entrapped rodents to survive within the trap until they can be released into a suitable environment. The improved rodent trap is preferably comprised of a transparent or translucent enclosure having a removable lid, a one way, spring biased door, an air supply, and a food and water source contained therein to sustain the rodents during their period of captivity. The removable lid is preferably attached to the enclosure via a “F” shaped channel that is positioned on each of a front panel and opposing side panels.

Abstract: A circulator may include a first port having a first port impedance matching circuit defining an impedance of the first port, a second port having a second port impedance matching circuit defining an impedance of the second port, and a third port having a third port impedance matching circuit defining an impedance of the third port. In an example embodiment, the impedance of the first port may be provided to match an impedance of a first external circuit, the impedance of the second port may be provided to match an impedance of a second external circuit, and the impedance of the third port may be provided to match an impedance of a third external circuit. The impedance of the third port may be different than the impedance of the first port.